Patents by Inventor Stephen M. Rossnagel

Stephen M. Rossnagel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120267249
    Abstract: A filter includes a membrane having a plurality of nanochannels formed therein. A first surface charge material is deposited on an end portion of the nanochannels. The first surface charge material includes a surface charge to electrostatically influence ions in an electrolytic solution such that the nanochannels reflect ions back into the electrolytic solution while passing a fluid of the electrolytic solution. Methods for making and using the filter are also provided.
    Type: Application
    Filed: June 27, 2012
    Publication date: October 25, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: JOHN M. COTTE, Christopher V. Jahnes, Hongbo Peng, Stephen M. Rossnagel
  • Patent number: 8287604
    Abstract: A capacitor includes a plurality of nanochannels formed in a dielectric material. A conductive film is formed over interior surfaces of the nanochannels, and a charge barrier is formed over the conductive film. An electrolytic solution is disposed in the nanochannels. An electrode is coupled to the electrolytic solution in the nanochannels to form the capacitor.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: October 16, 2012
    Assignee: International Business Machines Corporation
    Inventors: Richard A. Haight, Stephen M. Rossnagel
  • Patent number: 8278155
    Abstract: A reversible fuse structure in an integrated circuit is obtained through the implementation of a fuse cell having a short thin line of phase change materials in contact with via and line structures capable of passing current through the line of phase change material (fuse cell). The current is passed through the fuse cell in order to change the material from a less resistive material to a more resistive material through heating the phase change material in the crystalline state to the melting point then quickly quenching the material into the amorphous state. The reversible programming is achieved by passing a lower current through the fuse cell to convert the high resistivity amorphous material to a lower resistivity crystalline material. Appropriate sense-circuitry is integrated to read the information stored in the fuses, wherein said sense circuitry is used to enable or disable circuitry.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: October 2, 2012
    Assignee: International Business Machines Corporation
    Inventors: Geoffrey W. Burr, Chandrasekharan Kothandaraman, Chung Hon Lam, Xiao Hu Liu, Stephen M. Rossnagel, Christy S. Tyberg, Robert L. Wisnieff
  • Publication number: 20120193236
    Abstract: A nanodevice is provided that includes a reservoir filled with a conductive fluid and a membrane separating the reservoir. The membrane includes an electrode layer having a tunneling junction formed therein. A nanopore is formed through the membrane, and the nanopore is formed through other layers of the membrane such that the nanopore is aligned with the tunneling junction of the electrode layer. When a voltage is applied to the electrode layer, a tunneling current is generated by a base in the tunneling junction to be measured as a signature for distinguishing the base. When an organic coating is formed on an inside surface of the tunneling junction, transient bonds are formed between the electrode layer and the base.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hongbo Peng, Stephen M. Rossnagel, Ajay K. Royyuru, Gustavo A. Stolovitky, Deqiang Wang
  • Publication number: 20120193235
    Abstract: A nanodevice includes a reservoir filled with a conductive fluid and a membrane separating the reservoir. The membrane includes an insulating layer. A nanopore is formed through the membrane, and an organic coating is provided on the insulating layer to form a transient bond to a DNA molecule in the nanopore. The transient bond is stronger than thermal motion, such that the transient bond can hold the DNA molecule against the thermal motion. When a voltage is applied across the membrane, the voltage will break the transient bond to move the DNA molecule through the nanopore in a controllable state.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Applicant: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Glenn J. Martyna, Hongbo Peng, Stephen M. Rossnagel, Ajay K. Royyuru, Gustavo A. Stolovitzky, Philip S. Waggoner
  • Publication number: 20120193237
    Abstract: A nanodevice includes a reservoir filled with conductive fluid and a membrane separating the reservoir. A nanopore is formed through the membrane having electrode layers separated by insulating layers. A certain electrode layer has a first type of organic coating and a pair of electrode layers has a second type. The first type of organic coating forms a motion control transient bond to a molecule in the nanopore for motion control, and the second type forms first and second transient bonds to different bonding sites of a base of the molecule. When a voltage is applied to the pair of electrode layers a tunneling current is generated by the base in the nanopore, and the tunneling current travels via the first and second transient bonds formed to be measured as a current signature for distinguishing the base. The motion control transient bond is stronger than first and second transient bonds.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Hongbo Peng, Stephen M. Rossnagel, Ajay K. Royyuru, Gustavo A. Stolovitzky, Philip S. Waggoner
  • Publication number: 20120193231
    Abstract: A nanodevice is provided. A reservoir is filled with an ionic fluid. A membrane separates the reservoir, and the membrane includes electrode layers separated by insulating layers in which the electrode layers have an organic coating. A nanopore is formed through the membrane, and the organic coating on the electrode layers forms transient bonds to a base of a molecule in the nanopore. When a first voltage is applied to the electrode layers a tunneling current is generated by the base in the nanopore, and the tunneling current travels through the transient bonds formed to the base to be measured as a current signature for distinguishing the base.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Stefan Harrer, Binquan Luan, Glenn J. Martyna, Hongbo Peng, Stephen M. Rossnagel, Gustavo A. Stolovitzky, Philip S. Waggoner, George F. Walker
  • Patent number: 8212218
    Abstract: A system for determining an amount of radiation includes a dosimeter configured to receive the amount of radiation, the dosimeter comprising a circuit having a resonant frequency, such that the resonant frequency of the circuit changes according to the amount of radiation received by the dosimeter, the dosimeter further configured to absorb RF energy at the resonant frequency of the circuit; a radio frequency (RF) transmitter configured to transmit the RF energy at the resonant frequency to the dosimeter; and a receiver configured to determine the resonant frequency of the dosimeter based on the absorbed RF energy, wherein the amount of radiation is determined based on the resonant frequency.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: July 3, 2012
    Assignee: International Business Machines Corporation
    Inventors: Cyril Cabral, Jr., Michael S. Gordon, Steven J. Koester, Conal E. Murray, Kenneth P. Rodbell, Stephen M. Rossnagel, Robert L. Wisnieff, Jeng-bang Yau
  • Publication number: 20120103821
    Abstract: Nanofluidic passages such as nanochannels and nanopores are closed or opened in a controlled manner through the use of a feedback system. An oxide layer is grown or removed within a passage in the presence of an electrolyte until the passage reaches selected dimensions or is closed. The change in dimensions of the nanofluidic passage is measured during fabrication. The ionic current level through the passage can be used to determine passage dimensions. Fluid flow through an array of fluidic elements can be controlled by selective oxidation of fluidic passages between elements.
    Type: Application
    Filed: February 4, 2011
    Publication date: May 3, 2012
    Applicant: International Business Machines Corporation
    Inventors: Stefan Harrer, Stephen M. Rossnagel, Philip S. Waggoner
  • Publication number: 20120057273
    Abstract: A nanoporous templating substrate, which is an anodically oxidized alumina (AAO) substrate, is employed to form a pseudocapacitor having high stored energy density. A pseudocapacitive material is deposited conformally along the sidewalls of the AAO substrate by atomic layer deposition, chemical vapor deposition), and/or electrochemical deposition employing a nucleation layer. The thickness of the pseudocapacitive material on the walls can be precisely controlled in the deposition process. The AAO is etched to form an array of nanotubes of the PC material that are cylindrical and structurally robust with cavities therein. Because the AAO substrate that acts as scaffolding is removed, only the active PC material is left behind, thereby maximizing the energy per mass. In addition, nanotubes may be de-anchored from a substrate so that free-standing nanotubes having randomized orientations may be deposited on a conductive substrate to form an electrode of a pseudocapacitor.
    Type: Application
    Filed: September 7, 2010
    Publication date: March 8, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Richard A. Haight, Stephen M. Rossnagel
  • Patent number: 8110410
    Abstract: A field effect transistor device includes: a reservoir bifurcated by a membrane of three layers: two electrically insulating layers; and an electrically conductive gate between the two insulating layers. The gate has a surface charge polarity different from at least one of the insulating layers. A nanochannel runs through the membrane, connecting both parts of the reservoir. The device further includes: an ionic solution filling the reservoir and the nanochannel; a drain electrode; a source electrode; and voltages applied to the electrodes (a voltage between the source and drain electrodes and a voltage on the gate) for turning on an ionic current through the ionic channel wherein the voltage on the gate gates the transportation of ions through the ionic channel.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: February 7, 2012
    Assignee: International Business Machines Corporation
    Inventors: Hongbo Peng, Stanislav Polonsky, Stephen M. Rossnagel, Gustavo Alejandro Stolovitzky
  • Publication number: 20120009771
    Abstract: A method for formation of a segregated interfacial dopant layer at a junction between a semiconductor material and a silicide layer includes depositing a doped metal layer over the semiconductor material; annealing the doped metal layer and the semiconductor material, wherein the anneal causes a portion of the doped metal layer and a portion of the semiconductor material to react to form the silicide layer on the semiconductor material, and wherein the anneal further causes the segregated interfacial dopant layer to form between the semiconductor material and the silicide layer, the segregated interfacial dopant layer comprising dopants from the doped metal layer; and removing an unreacted portion of the doped metal layer from the silicide layer.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 12, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cyril Cabral, JR., John M. Cotte, Dinesh R. Koli, Laura L. Kosbar, Mahadevaiyer Krishnan, Christian Lavoie, Stephen M. Rossnagel, Zhen Zhang
  • Patent number: 8084760
    Abstract: An electrode structure and a method for manufacturing an integrated circuit electrode includes forming a bottom electrode comprising a pipe-shaped member, filled with a conductive material such as n-doped silicon, and having a ring-shaped top surface. A disc-shaped insulating member is formed on the top of the pipe-shaped member by oxidizing the conductive fill. A layer of programmable resistance material, such as a phase change material, is deposited in contact with the top surface of the pipe-shaped member. A top electrode in contact with the layer of programmable resistance material.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: December 27, 2011
    Assignee: Macronix International Co., Ltd.
    Inventors: Hsiang-Lan Lung, Shih-Hung Chen, Stephen M. Rossnagel
  • Patent number: 8084319
    Abstract: Methods are provided for fabricating devices. A first layer is formed. A hardmask on the first layer is formed. Features on the hardmask are patterned. The sizes of features on the hardmask are reduced by applying a plasma treatment process to form reduced size features. Also, the size of features on the hardmask can be enlarged to form enlarged size features by applying the plasma treatment process and/or removing the oxidized part of the feature during plasma treatment process. Another method may include a first layer formed on a substrate and a second layer formed on the first layer. First features are patterned on the first layer, and second features are patterned on the second layer. A size of second features on the second layer is closed due to the different oxidation rate of the two layers during the plasma treatment process, to form a self-sealed channel and/or self-buried trench.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: December 27, 2011
    Assignee: International Business Machines Corporation
    Inventors: Hongbo Peng, Stephen M. Rossnagel, Katherine L. Saenger
  • Patent number: 8039250
    Abstract: Apparatus, system, and methods are provided for utilizing piezoelectric material for controlling a polymer through a nanopore. A reservoir is formed filled with conductive fluid. A membrane is formed that separates the reservoir. A nanopore is formed through the membrane. The membrane comprises electrical conductive layers, piezoelectric layers, and insulating layers. The piezoelectric layers are operative to control a size of the nanopore for clamping/releasing a polymer as well as to control the thickness of part of the membrane when a voltage is applied to the piezoelectric layers. Combinations of clamping/releasing the polymer and changing the thickness of part of the membrane can move a polymer through the nanopore at any electrically controlled speed and also stretch or break a polymer in the nanopore.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: October 18, 2011
    Assignee: International Business Machines Corporation
    Inventors: Hongbo Peng, Gustavo A. Stolovitzky, Stephen M. Rossnagel, Stanislav Polonsky, Binquan Luan, Glenn J. Martyna
  • Patent number: 8029716
    Abstract: Amorphous inorganic nitrides are used as release layers on templates for nanoimprint lithography. Such a layer facilitates the release of a template from a cured, hardened composition into which the template has transferred a pattern, by reducing the adhesion energy between the release layer and the cured, hardened composition. The release layer may include one or more metallic or semiconductor elements such as Al, Mn, B, Co, Ti, Ta, W and Ge.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: October 4, 2011
    Assignee: International Business Machines Corporation
    Inventors: Frances A Houle, Christopher V. Jahnes, Simone Raoux, Stephen M Rossnagel
  • Publication number: 20110227021
    Abstract: Techniques for forming a phase change memory cell. An example apparatus includes a substrate and a bottom electrode carried by the substrate. The bottom electrode is a thermal conductor. A phase change layer, including phase change material, is disposed over the bottom electrode. A thermal insulating layer is disposed above the phase change layer. A heater is configured to temporarily melt the phase change material such that the phase change material crystallizes without voids within a switching region after melting.
    Type: Application
    Filed: June 1, 2011
    Publication date: September 22, 2011
    Applicant: International Business Machines Corporation
    Inventors: Alejandro G. Schrott, Chung H. Lam, Stephen M. Rossnagel
  • Publication number: 20110223652
    Abstract: Apparatus, system, and methods are provided for utilizing piezoelectric material for controlling a polymer through a nanopore. A reservoir is formed filled with conductive fluid. A membrane is formed that separates the reservoir. A nanopore is formed through the membrane. The membrane comprises electrical conductive layers, piezoelectric layers, and insulating layers. The piezoelectric layers are operative to control a size of the nanopore for clamping/releasing a polymer as well as to control the thickness of part of the membrane when a voltage is applied to the piezoelectric layers. Combinations of clamping/releasing the polymer and changing the thickness of part of the membrane can move a polymer through the nanopore at any electrically controlled speed and also stretch or break a polymer in the nanopore.
    Type: Application
    Filed: March 15, 2010
    Publication date: September 15, 2011
    Applicant: International Business Machines Corporation
    Inventors: Hongbo Peng, Gustavo A. Stolovitsky, Stephen M. Rossnagel, Stanislav Polonsky, Binquan Luan, Glenn J. Martyna
  • Patent number: 8017433
    Abstract: Techniques for forming a phase change memory cell. An example method includes forming a bottom electrode within a substrate. The method includes forming a phase change layer above the bottom electrode. The method includes forming a capping layer and an insulator layer. The method includes crystallizing the phase change material in the phase change layer so that the phase change layer is void free. The method further comprises heating the phase change material in the phase change layer from the bottom electrode and as a result the phase change layer is crystallized from the bottom to the top. In one embodiment, a rapid thermal anneal (RTA) is applied for crystallizing the phase change material.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: September 13, 2011
    Assignee: International Business Machines Corporation
    Inventors: Chung H. Lam, Stephen M. Rossnagel, Alejandro G. Schrott
  • Publication number: 20110207286
    Abstract: A reversible fuse structure in an integrated circuit is obtained through the implementation of a fuse cell having a short thin line of phase change materials in contact with via and line structures capable of passing current through the line of phase change material (fuse cell). The current is passed through the fuse cell in order to change the material from a less resistive material to a more resistive material through heating the phase change material in the crystalline state to the melting point then quickly quenching the material into the amorphous state. The reversible programming is achieved by passing a lower current through the fuse cell to convert the high resistivity amorphous material to a lower resistivity crystalline material. Appropriate sense-circuitry is integrated to read the information stored in the fuses, wherein said sense circuitry is used to enable or disable circuitry.
    Type: Application
    Filed: May 4, 2011
    Publication date: August 25, 2011
    Inventors: Geoffrey W. Burr, Chandrasekharan Kothandaraman, Chung Hon Lam, Xiao Hu Liu, Stephen M. Rossnagel, Christy S. Tyberg, Robert L. Wisnieff